Type-writing machine.



PATENTED AUG.14, 1906.

' A. H. IIAIIL.

TYPE WRITING -IvIAoHINI-I.

APPLICXTION FILED NOV. 30,19034 Z SHEETS-SHEET 1,

IMM. NIN XJ i; HY/f ATTORNEY No. 828,848. PAIIIIITED A8814, 1908. A. H, DAHL. TIPI: WRITING MACHINE.

APPLICATION FILED NOV.30. 1903.

2 SHEETS-SHEET 2.

f MAW-@5M AUGUST H. DAHL, F NEW YORK, NQ VY.

TYPE-WRITHNG MACHINE.

ySpecicaton of Letters Patent.

Patented Aug. 14, 1906.

Applicatiomiled November 1903.. Serial No. 183.144.

ToctZZ w/'tom'zt vital/conceive:

Be it known'that I, AUGUST H. DAHL, a

l `citizen of the United States, residing inthe carriage borough of Brooklyn, in the city and State of New York, have invented a 4certain new and useful Improvement in Type-Writing Machines, of which the following vis a specifica- '.tion.

The improvement is intended to apply more especially to type-writin machines of the visible-writing class, and will describe it as applied to one of the best known of tlfat class, the Oliver type-writing machine, con-v structed as set forth in the patent to Thomas Oliver, lated March 1, 1898, No. 599,863, which is hereby referred to as supplementary to the following description.

The improvement relates to provisions for guiding'the Amaterial on which thetypewriting is to be effected, and which I will designate by the simple term paper The invention provides.- for vguiding cards, en-

velops, and other forms and sizes of paper correctlyv and exposing for easy inspection what has been done across the entire width quite out to the edge of the sheet. The construction holds the paper reliably in contact with the platen at and adjacent to the points where the type is impressed, and thus allows typewriting to be effected at the extreme upper and lower edges without slurring. Y

The following is a description of what l consider the best means of carrying out the invention.

The accompanying drawings form a part of this specification.

Figure 1 is a plan view showing in strong lines the parts 1n which the novelty is inn volved and in dotted lines so much of the other parts of the machine as is necessary to indicate their relation thereto. Fig. 2 is a perspective view showing a portion detached. Fig. 3 is a cross-section of one of the arms on the line 3 3 in Fig. 2. The remaining figures show modifications, Fig. 4 is a side elevation. Fig. 5 is a plan view of the controller and of the associated ribbonthrow. Fig. 6 is a side view of certain portions showing another modification.

Similar letters of reference indicate correspci'iding parts in all the figures Where they a )neen i is a fixed casting which forms the base, E the key-ievers, and C the t e-bars. i

i ill when necessary re er to the yentire using there@ letter with ferent supernumerals to parts thereof. y

E represents the end plates. E4 is the large soft-surfaced roller, which performs the ordinary functions of aplaten. ,E5 is a lower presser-roller, and E10 and E1l are front presser-rollers, proper force being provided for holding these parts gently in contact with the platen by gentle springs.

and provisions by a lever Es and connections for removing them from their contact with the platen when required in adjusting the paper and, desired, in introducing it.

E15 is a y'ieldingly-mounted strip marked with a scale. It resses the paper? gently and uniformly on t e platen adjacent to the line of writing to` be impressed.

E21 is a'movable fourth and final pressin roller arranged' to press the paper gentf upon the platen after it has assed the printing-line. This roller is easi y moved out of the way, having its bearings 1n arms E2", pivoted on the carriage.:

E24 is a spring which holds the roller in contact withthe pa er and holds it in the removed position w en desired.

The, arms E2O E2o are pivoted on the carriage far in rear of the platen and have bearings formed in their free ends, which receive the journals of the fourth pressing-roll E21. The pivoted links allow it to be lifted and thrownfoverinto a position so much farther indicate specific rearward as to be no obstruction in viewing the recently-Written lines.

`extends rearward beyond the printing-line and partially downward .in rear of the platen. The rear end of each of these forks is turned sli htly upward. This device is capable of til ing on an aXisZ, which is mounted in' bearings supported on a fixed upright U on the stationaryy base A. The connection of this upright with the base is secured by screws inserted in open slots in the foot of the base. This mode of connection allows the upright'and its lattachments to be easily re- The roller can beh brought back again into position for `use by IOO IIO

Its axial motionv and springr forcefallow it .to yield to serve with different thicknessesof the'paper, holding the paper'always in gentle contact, and valso to .allow the effective portion-the rear end of the controllerf-toJbe .lifted to large extents'when required. .The

lifting action is effected by pressingdown with the finger onthe arm Z3, which extends forward beyond the axis Z. This device performs twofunctionsijFirst,

'by the position of the arrnsand 'the spurs e' thereon it' `indicates the printingLpoint`-,the

vpoint where the several types strike von the paper. j This is important, especially `in making corrections.

Another function ist'o hold 'the paper down into r constantcontact with the cylindrical surface of the platen. By extending beyond the printing-peint and conforming to the cylindrical surface of the platen it insures that the paper at 'and -adjacent'to the rintingpoint isheld .in contact with vlthe platen, so

` that at the 'place where thel type is` pressed thereon the pap r is stationary and the impression is clear andzperfect. l

Modifications may be made without departing. from the principle or' sacrificing thev ,advantages vof the4 invention. l ,The controller may be made to serve with'somey success without being pivoted simply bolting it upon the fixed sup ort. n such case it shouldy be extended a out the same, as shown," and should bepurved, as shown, sol as te ex* actly corres ond :to kthe surface of the platen vat aslight istancfe'therefrom.' It should be made stiff enough to resistthe lifting force of stiff paper or card. This should be secured by screws engaged in open slots in the foot, allowin easy removal and replacing, as

sponding upri ht.

The spring l 2 can be easily removed, :anda `substitute spring of corresponding form and size or 'having :greater or less tension can be above escribed,'for the securing ofthe correintrcducedin 1ts place,at any time.- ThisA allows the force with which the controller presses the paper upon the platen to .be varied at willktojaccommodate paper differing in thickness or rigidity.

Instead of having thearn'zsEz" independent they may be rigidly connected by a crossbar E23. Such is shown in-Fig. 6'. By lo'- cating the cross-bar in the position shown it will come immediately above lthe roller when the latter is swun 4cases the controller -chan ed in position and shape.

' specified.

overl into use. With this constructionv w en' the roller is moved out ofthe way it gives a'eornpletely unob-V structed view of `a large areaof the typewhich has been last eected, such arpa-extending quite out totheedgeon each ing-roller E21 maybe out o use. For some kinds 'of work, as 1etter.writing and taking testimony, using uniform thin paper with or The provcrnentlmay be applied with "success to 1machines in which the printingpointA is not on the top,`but is v'onthe front' or on the underside of the platen. In such is correspondingly I c airn as my inventionf- 1. In a type-writer having a cylindrical platen, aforked controller Z Z havingtwo arms made integral, each with an index-point on` itsfinner edge, mounted on the fixed framework andl extending rearward over the platen and arti-ally downward in rear thereof, arranged) to serve substantially as herein 2. In a type-writer havinga cylindrical platen, a U-shaped controller Z Z mounted on the fixed framing and extending rearward over the platenand artially downward in rear thereof arranged'p to tilt and having a front arm arranged to'be convenientl`. de-

pressed when required, all substantial as specified. f 3. In a type-'writer having` a cylindrical platen, a controllerZ Z mounted on the fixed framing'carrying the spurs z z and extending rearward over the platen and partially downward in rear thereof arranged to tilt and having afront arm varranged to be conveniently depressed when required, in combination with an actuating-spring andfarran ed to operate substantially as herein specific 4. In a type-writer having a cylindrical platen, two indicators Z Z made integral, mounted on the fixed framing and presenting the spurs a s on the right and left of the printing-point, the holding-roller E21 carried' .on arms capable of being turned so as to be conveniently thrown out of use at will, leav-4 ing a clear s ace in therear to allow easy inspection of t e entire printed surface, all substantially as herein specified.

In testimony that I claim the invention above set forth I aflix my signaturein presence of two witnesses. ,a

. lAUGUST H. DAHL. 'Witnessesz j v A. R. APPLEMAN, THoMAs DREW STETsoN.

-For ordinary type-writin work Ath pressi I IOO IIO 

